Question Answering on Freebase via Relation Extraction and Textual Evidence
Kun Xu,Siva Reddy,Yansong Feng,Songfang Huang,Dongyan Zhao +4 more
- Vol. 1, pp 2326-2336
TLDR
The authors used a neural network based relation extractor to retrieve candidate answers from Freebase, and then infer over Wikipedia to validate these answers, achieving an F_1 of 53.3% on the WebQuestions question answering dataset.Abstract:Â
Existing knowledge-based question answering systems often rely on small annotated training data. While shallow methods like relation extraction are robust to data scarcity, they are less expressive than the deep meaning representation methods like semantic parsing, thereby failing at answering questions involving multiple constraints. Here we alleviate this problem by empowering a relation extraction method with additional evidence from Wikipedia. We first present a neural network based relation extractor to retrieve the candidate answers from Freebase, and then infer over Wikipedia to validate these answers. Experiments on the WebQuestions question answering dataset show that our method achieves an F_1 of 53.3%, a substantial improvement over the state-of-the-art.read more
Citations
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An End-to-End Model for Question Answering over Knowledge Base with Cross-Attention Combining Global Knowledge
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